Benny Mardones is coming back to town. Fans will rejoice. People will sing along to “Into the Night.” Women of all ages will jump on stage and dance mightily to “Sheila C.” Mardones and his Syracuse band, the Hurricanes, rocking out for “Benny’s Backyard BBQ Bash,” Aug. 3 at Sharkey’s, on Oswego Road in Liverpool.…